Well here it is, dark matter. You can't see it, but you are definitely looking
right at it. This is the dwarf galaxy Segue 1, one of a couple dozen dwarf galaxies
that orbit our own galaxy, the Milky Way. It is about 80,000 light years away,
roughly three times as far as the center of our galaxy. Segue 1 only contains
about 1000 stars. However, the red shifts of those stars indicate a large velocity
dispersion. The star's velocity dispersion is so large that for them to be bound
together by gravity, as they evidently are, the galaxy must contain about 500 times
as much mass as is contained in the stars. In other words, this galaxy contains
500 times as much dark matter as normal matter, i.e. it is 99.8% dark matter.
Here is a reference
and a companion paper.